Until now rt-loader expects a piggy-backed lzma compressed data
stream. Be more flexible and allow a piggy-backed uimage as well.
Signed-off-by: Markus Stockhausen <markus.stockhausen@gmx.de>
Link: https://github.com/openwrt/openwrt/pull/21332
Signed-off-by: Robert Marko <robimarko@gmail.com>